/Engine/Source/Editor/UnrealEd/Classes/Exporters/LevelExporterT3D.h
Allows the Exporter to export any extra information it would like about each instanced object. This occurs immediately after the component is exported.
virtual void ExportComponentExtra ( const [FExportObjectInnerContext](API\Runtime\Engine\FExportObjectInnerContext) * Context, const [TArray](API\Runtime\Core\Containers\TArray)< [UActorComponent](API\Runtime\Engine\Components\UActorComponent) * > & Components, [FOutputDevice](API\Runtime\Core\Misc\FOutputDevice) & Ar, uint32 PortFlags )